Issue 4, 2017
From the journal:

Energy & Environmental Science

Ferroelectric domains in methylammonium lead iodide perovskite thin-films†

Holger Röhm,‡ab   Tobias Leonhard,‡ab   Michael J. Hoffmannbc  and  Alexander Colsmann ORCID logo *ab  

* Corresponding authors

a Light Technology Institute, Karlsruhe Institute of Technology (KIT), Engesserstrasse 13, 76131 Karlsruhe, Germany
E-mail: alexander.colsmann@kit.edu

b Material Research Center for Energy Systems (MZE), Karlsruhe Institute of Technology (KIT), Strasse am Forum 7, 76131 Karlsruhe, Germany

c Institute for Applied Materials – Ceramic Materials and Technologies, Karlsruhe Institute of Technology (KIT), Haid-und-Neu-Strasse 7, 76131 Karlsruhe, Germany

Abstract

We explore the ferroic properties of methylammonium lead iodide perovskite solar cells by piezoresponse force microscopy (PFM). In vertical and horizontal PFM imaging, we find domains of alternating polarization with a width of 90 nm which we identify as polarized ferroelectric domains. High-resolution photo-conductive atomic force micrographs under illumination also show alternating charge carrier extraction patterns which we attribute to the local vertical polarization components within the ferroelectric domains. The correlation of the sample properties with atomic force and kelvin probe force micrographs evidence the ferroelectric nature of the domains.

Graphical abstract: Ferroelectric domains in methylammonium lead iodide perovskite thin-films

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Article information

DOI
https://doi.org/10.1039/C7EE00420F
Article type
Paper
Submitted
13 Feb 2017
Accepted
08 Mar 2017
First published
09 Mar 2017

Energy Environ. Sci., 2017,10, 950-955

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Ferroelectric domains in methylammonium lead iodide perovskite thin-films

H. Röhm, T. Leonhard, M. J. Hoffmann and A. Colsmann, Energy Environ. Sci., 2017, 10, 950 DOI: 10.1039/C7EE00420F

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